20kw Wall Mounted Gas Combi Boiler Home Central Heating

For ordinary residential buildings of 80-150 square meters, choose 24KW. For 150m2 or larger units or villas, choose 28KW or above. For homes in the south without insulation or with multiple bathrooms, increase power by 20% to 30%.

Most online models include free basic installation but exclude special fees like high-altitude work and wall drilling. Auxiliary materials such as pipes and filters are purchased separately, with total costs usually around 1,000 yuan.

It cannot run at the same time. The hot water function starts first. The machine automatically switches between heating and hot water modes based on faucet usage, suspending heating temporarily during hot water use.

First-class energy efficiency boilers are often condensing types with thermal efficiency over 107%, saving 15% to 20% on gas fees compared to ordinary boilers. This is cost-effective for long-term use, especially in large houses.

Yes. For old or renovated houses, you can choose an open-air radiator system that does not damage walls or decoration. After ordering, you can book a master to measure and design the installation plan.